Buffered Serial Port Driver for RTOS
Dependents: nucleo_cannonball PiballNeoController
Buffered Serial Port Driver for RTOS
- ISR driven, ring buffered IO operation
- IO operations are idle waiting, don't waste time in RTOS :D
- Can use external buffers
- Based on mbed RawSerial
Example
SerialDriver Example
#include "SerialDriver.h" SerialDriver pc(USBTX, USBRX); int main() { // setup serial port pc.baud(9600); // print some text pc.puts("This is just a string.\r\n"); pc.printf("But this is a %s with integer %i and float %f.\r\n", "formatted text", 123, 0.456f); // now lets behave like a null modem while(1) pc.putc(pc.getc()); }
Look at the API Documentation for more Examples.
Dependencies
Import librarymbed
The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
Import librarymbed-rtos
Official mbed Real Time Operating System based on the RTX implementation of the CMSIS-RTOS API open standard.
If you find a bug, please help me to fix it. Send me a message. You can help me a lot: Write a demo program that causes the bug reproducible.
Diff: SerialDriver.cpp
- Revision:
- 3:ea9719695b6a
- Parent:
- 0:cd0d79be0c1a
- Child:
- 4:a41e47716932
diff -r 012c0c2fac52 -r ea9719695b6a SerialDriver.cpp --- a/SerialDriver.cpp Thu Jan 15 09:53:09 2015 +0000 +++ b/SerialDriver.cpp Mon Jan 26 19:21:56 2015 +0000 @@ -35,10 +35,13 @@ rxIn= rxOut= 0; txCount= rxCount= 0; + // reset drop counters + numTxDrops= 0; + numRxDrops= 0; + // attach interrupt routines attach(this, &SerialDriver::onTxIrq, TxIrq); attach(this, &SerialDriver::onRxIrq, RxIrq); - } int SerialDriver::putc(int c, unsigned int timeoutMs) @@ -58,6 +61,7 @@ disableTxInterrupt(); if(isTxBufferFull()) // still full? drop byte! { + numTxDrops++; enableTxInterrupt(); return 0; } @@ -152,7 +156,9 @@ rxBuffer[rxIn]= (unsigned char)c; rxIn= (rxIn+1) % rxBufferLength; rxCount++; - } // else drop byte :( + } + else // drop byte :( + numRxDrops++; } if(wasEmpty && !isRxBufferEmpty()) // more bytes can go @@ -212,4 +218,4 @@ return length; } -// for XTN +// still thinking of XTN